Search:
Type: Posts; User: HWORRELL
-
11-06-2009 03:22 PM
Thread: Low Vacuum in 390
by HWORRELL- Replies
- 16
- Views
- 8,842
Mark it sounded wonderfull in the shop and...
Mark it sounded wonderfull in the shop and putting it on the trailer, With the choppy idle it was hard to tell till I hit the track and the dang thing would'nt rev. The points battle was close enough...
-
11-06-2009 06:40 AM
Thread: Low Vacuum in 390
by HWORRELL- Replies
- 16
- Views
- 8,842
Hey Mark, It's real easy to miss the timing dots...
Hey Mark, It's real easy to miss the timing dots by one tooth. I've done it myself and I do this for a living. I've learned that no matter how close those dots look you need to turn the engine over 2...
-
11-05-2009 01:43 PM
Thread: Low Vacuum in 390
by HWORRELL- Replies
- 16
- Views
- 8,842
Looking at my vacuum gauge 150 mmHg equals about...
Looking at my vacuum gauge 150 mmHg equals about 6 inches of vacuum,
Not near enough. I'd start looking to make sure you did not miss the timing marks when you installed the timing chain, -
11-05-2009 01:15 PM
Thread: Low Vacuum in 390
by HWORRELL- Replies
- 16
- Views
- 8,842
vacume to the modulator should be straight...
vacume to the modulator should be straight manifold vacume not carb venturi vacume. If thats correct I would measure vacume at the modulator end of the vacume line,maybe it has a leak in the line or...
Thanks Glenn, it’s believed to be a Gen 5. 454. I’ll see if I can snap some pics of the stamped and cast numbers and post them here. Maybe we can define the year and model
GM Engine de-coding